"It would be a difficult decision for me. I would have to have both proposals on the table before deciding.

"Right now I just have to work and do well if I don't want these two great clubs to lose their interest in me."

Paredes, who began his career at Boca Juniors and is under contract at Zenit until 2021, believes he is ready to play for a top club.

"I am young and I have to think well about the choice I will make," he said. "Going to Madrid, with all the champions they have in the squad, does not make me afraid. I would be ready for the challenge.

"But there are also other factors to take into account before making a final decision. I have a lot of friends in Turin, but at Madrid there are so many champions that it would be stimulating for a young player as I am.

"But right now I'm concentrating on the end of the season with Zenit and then we shall see -- you never know what can happen at the end of the season."